Piston of an internal-combustion engine

Patent metadata

Field	Value
Publication number	US-2020132016-A1
Application number	US-201916666385-A
Country	US
Kind code	A1
Filing date	Oct 28, 2019
Priority date	Oct 29, 2018
Publication date	Apr 30, 2020
Grant date	—

Abstract

A piston of an internal-combustion engine may include a piston head and a piston skirt, a cooling duct circulating in the piston head, a boss for receiving a piston pin, and a feed hopper for supplying cooling oil into the cooling duct. The feed hopper may be fastened to another component of the piston via a retaining lug by at least one of a material closure, a force closure, and a positive closure.

First claim

1 . A piston of an internal-combustion engine, comprising:
a piston head and a piston skirt; a cooling duct circulating in the piston head; a boss for receiving a piston pin; and a feed hopper for supplying cooling oil into the cooling duct; wherein the feed hopper is fastened to another component of the piston via a retaining lug by at least one of a material closure, a force closure, and a positive closure.

2 . The piston according to claim 1 , wherein the feed hopper is fastened via the retaining lug to an inside of the piston skirt or to the boss.

3 . The piston according to claim 1 , further comprising a slipper-skirt wall, wherein the feed hopper is fastened via the retaining lug to the slipper-skirt wall.

4 . The piston according to claim 1 , wherein at least one of:
the retaining lug is L-shaped, with an L-shank extending in a peripheral direction of the piston; and the retaining lug is integrally formed with the feed hopper.

5 . The piston according to claim 1 , wherein the cooling duct has a feed aperture through which the feed hopper protrudes.

6 . The piston according to claim 1 , further comprising a cooling-duct cover that includes a feed aperture through which the feed hopper protrudes.

7 . The piston according to claim 6 , wherein the feed hopper is not in contact with the cooling-duct cover.

8 . The piston according to claim 5 , further comprising a sealing element which at least partially closes a gap between the feed hopper and an edge of the feed aperture.

9 . The piston according to claim 1 , wherein the feed hopper has a diverting device via which cooling oil injected into the feed hopper is diverted in a peripheral direction of the cooling duct.

10 . The piston according to claim 1 , wherein the feed hopper is a slotted sheet-metal shaped part.

11 . An internal-combustion engine comprising at least one piston including:
a piston head and a piston skirt; a cooling duct circulating in the piston head; a boss for receiving a piston pin; and a feed hopper for supplying cooling oil into the cooling duct; wherein the feed hopper is fastened to another component of the piston via a retaining lug by at least one of a material closure, a force closure, and a positive closure.

12 . The internal-combustion engine according to claim 11 , wherein the feed hopper is fastened via the retaining lug to an inside of the piston skirt or to the boss.

13 . The internal-combustion engine according to claim 11 , wherein the at least one piston further includes a slipper-skirt wall, and wherein the feed hopper is fastened via the retaining lug to the slipper-skirt wall.

14 . The internal-combustion engine according to claim 11 , wherein at least one of:
the retaining lug is L-shaped with an L-shank extending in a peripheral direction of the piston; and the retaining lug is integrally formed with the feed hopper.

15 . The internal-combustion engine according to claim 11 , wherein the cooling duct has a feed aperture through which the feed hopper protrudes.

16 . The internal-combustion engine according to claim 11 , wherein the at least one piston further includes a cooling-duct cover that includes a feed aperture through which the feed hopper protrudes.

17 . The internal-combustion engine according to claim 16 , wherein the feed hopper is not in contact with the cooling-duct cover.

18 . The internal-combustion engine according to claim 15 , wherein the at least one piston further includes a sealing element which at least partially closes a gap between the feed hopper and an edge of the feed aperture.

19 . The internal-combustion engine according to claim 11 , wherein the feed hopper has a diverting device via which cooling oil injected into the feed hopper is diverted in a peripheral direction of the cooling duct.

20 . A piston of an internal-combustion engine, comprising:
a piston head and a piston skirt; a cooling duct circulating in the piston head; a boss for receiving a piston pin; and a feed hopper for supplying cooling oil into the cooling duct; wherein the feed hopper is fastened to another component of the piston via a retaining lug by at least one of a material closure, a force closure, and a positive closure; wherein the retaining lug is L-shaped with an L-shank extending in a peripheral direction of the piston; and wherein the cooling duct has a feed aperture through which the feed hopper protrudes.

Assignees

• Mahle Int Gmbh

Inventors

• Licht Philipp
• Scharp Rainer

Classifications

• F02F3/22 Primary

  the fluid being liquid · CPC title

• F02F2003/0061

  by welding · CPC title

• F02F3/14

  within combustion chambers · CPC title

• F02F3/0069

  the crown and skirt being interconnected by the gudgeon pin · CPC title

• F02F7/007

  Adaptations for cooling · CPC title